Sometimes, bullies target those with low self esteem (they recognise it in the things people say, they way they carry themselves etc). Sometimes, they resent someone else's self assuredness and set out to 'bring them down a peg or two'. Sometimes, they see something in you that they are jealous of and it makes them feel inadequate. Sometimes, they launch their shit on everyone and wait to see where it sticks. Then they go back there for more. Sometimes, they back off when people stand up for themselves and sometimes they just up the ante.
Sometimes, people bully because they are unhappy and feel powerless in their own lives and this is how they improve their own self esteem. Sometimes, they bully because they have complete confidence in themselves and feel threatened when someone doesn't automatically agree/support them. When you realise that their confidence is actually quite fragile. And sometimes they're just not very nice people who hate the world and everyone in it for their own insecurities and perceived inadequacies.
When someone is bullied, it is solely the responsibility of the bully and never the fault of the victim. I'm sure there are people you don't like but you don't bully them do you? You just leave them alone to get on with their lives.
Start to realise this. It can be anything. You had support from your workplace to take it further but chose not to. That's fine! But they clearly like and support you.
You have a husband and a child. Unless he's a complete areshole to you, he likes you!
The problem is that we all experience confirmation bias. If you believe you are likeable, you see evidence all around you that you are likeable. That doesn't mean everyone likes you but you filter out and don't care about the ones who don't. If you believe you are unlikeable, you will find evidence of that all around you. It doesn't mean that no one likes you but that you filter out the evidence from those who do and only see the evidence that people don't.
As for weightloss, when you start to feel better about yourself, you believe you are worthwhile and valuable and you begin to make better choices for yourself. You care about yourself a bit more.
What self care do you do? What do you do that makes you feel good in and about yourself? One thing I do is start each day with a cup of tea in the garden. I can hear the birds singing, I can smell the morning air, and it sets me up for a good day.
Could you take a day off for yourself? Take yourself out somewhere? Have lunch? A coffee? Take a notebook with you and write down the things you like about yourself.
If that's hard, start with things that feel easier like - I have nice feet or I am loyal. Once you start, it becomes easier.
Then write down the things you'd like to improve about yourself. But word them positively eg I would like to be a healthy size/weight; I make healthy food choices rather than I'm fat or I need to lose weight.
Flip it in your head and change your mental perspective. The facts won't have changed but your perspective and mindset will. You'll find the fire in your belly to think, "fuck it!" And that will power you.
Sorry it's so long - speaking from personal experience